Choke valve



June 2, 1925- y 1,540,209

C. E. FRAZIER CHOKE VALVE Filed May lO. 1923 IMIHHHMWHIIV Patented June' `2, 1925..

UNITE); STATESV PATENT lOFFICE.

` CHARLES E. raAzrER, or DALLAS, TEXAS.

CHOK'E VALVE.

`Afppliation led May 10, 1923. Serial No. 637,967.

To all wle-m it' may concern j Be it known that I, CHARLES E. FRAZIER, a 'citizen of the United States of America, residing-atDallas, in the county of Dallas and State of Texas, have invented certain new and useful Improvements in Choke j flow by inserting a suitable reducing or choke valve in the discharge pipe. The rate of ow is controlled by thesize of theV passage inthe plug ofthe valve. @wing to the fact that sand is present in such flows of oil and the oil is under comparatively highl pressure, the sand will in a few hours, cut the valve'passage to the point that the flow becomes so excessive as to require the installation of a new valve.

Under the present practice it is necessary to shut off the flow of the oil, disconnect the valve and insert a new one in the discharge pipe This involves a loss of time, an added expense and considerable waste in production. s

The object of the invention is to provide a valve structure-having renewable valve plugs arranged to be successively introduced into the `oil passage and each having a pluI rality of oil ports spaced so, that when one is moved out of the oil passage, the next successive port-will be'brought into the passage. Thesi'ze of the ports are determined before the plugs are inserted and the plugs are each bored with same size of ports.

Another feature resides in meansA separate from the-plugs arranged to be screwed down to push the plugs through the valve casing,

without turning said plugs.

A yfurther object resides in forming the plugs so that they may be jointed together ing plugs, being spaced4 the same 'as` the other ports'of the plug.

A` construction designed to carry out the invention will be hereinafter described, to-

gether with other features of the invention.

invention'. 1s shown, and wherein :iY

' view of a choke valve constructed in sequence, the adjacent ports of adjoin-J thereinto.

Fig. 1, is a longitudinal vertical sectional in accordance with my invention.

Fig. 2, is a transverse vertical sectional view taken in the line 2-2 of Fig. 1, and u Fig. 3, is an elevation of one of the plugs. In the drawing the numeral designates a valve doby orfcasing which is, preferably formed of hardened steel and is'formedv onl each end with a nipple 11, externally `screw threaded. The nipples 11 receive couplin collars 12 by which the valve is connecte in adischarge pipe line 13.' The casing has a\longitudinal passage 14 extending there' throughy and registering with the bore of 15V bi-secting the passage and preferablyof larger diameter than said passage. At the top and bottom ,of thebore packing glands are formed by packing rings 16 and gland nuts 17, which are'counter-sunk in the casing, said nuts compressing the rings. A plurality of choke lplugs or cylinders l18 are provided and are inserted in the bore so as to extend through the packing glands, thus preventing fluids leaking from the bore.

' Each plug is larger than the bore and has a dove-,tail socket 19, at its upper end and a dove-tail lug 20 at its lower end. By this' arrangement the bottom of a following plugl may be attached to the top of the preceding plug so as to follow through the bore in` proper sequence. Each plug is provided with a pluralityof equallyspaced transverse ports 21-arranged in the same vertical plane and the lugs and sockets are so disposed. that the ports of one lug will align vertically with those of attached plugs. The ports at the ends of a plug are spaced from said ends so that when,two plugsA are coupled, the adjacent ports of each plug will be spaced the same distance as the other ports.

The ports are spaced on centers substantially the diameter of the bore so that when the plug is VVforced downwardly one port 100 rides out of the b ore as the other is brought downwardly in a straight line and never moved upwardly or turned.

For pushing the plugs through the Valve, 105

swiveled on its lower end. The ferrule 110 the pipe line. The casing has a vertical bore l The plugs are always moved has a flat-wunder side for bearing on thelup-f permost plugs andbeing held against rotation while the screw is turned." The yoke 1s high enough to permit an additional plug to be attached to the plug in the casing, and` positioned under the ferrul'e. A o

In using thevalve a plug 18 is lselected which has ports of the diameter necessary to give theJ desired flow through the valve. 'The screw 24 is backedjup s o that the vfel/'- rule is elevated high enough to insert the plug thereunder. The lower end of the plug is inserted in the gland 17` at the 'top ofthe casing and the ferrule screwed down ontop of said plug. The plug is forced downward until thefiirst` port 21 rides into the bore 14. vAny suitable means may be employed, asl

gauge marks (not shown) on the'plug, for stopping the plug with the ports 1n thel center of the bore. When the port is cut, by the abrasive action of the sand iiowing with its oil, to the point where the iiow becomes excessive,l the plug maybe moved down# ward by the screw 24 tobring the next port into the bore.

The ports are spacedso that as one rides out ofv the bore the next one will ride into the same. When the plug has been forced 'down to the position shown in Fig. 1, the screw 24 is backed-up andthe ferrule raised to the point, where an additional plug may be inserted. The dove-tail 20 on the bottom of Lthe added plug is inserted in the socket at the top of the plug in the valve and the ferrule screwed down on top of the added plug. In this way the .,plugs may. be forced through the valve. The plugs are .not turned or raised. The plug having a tight it it will be seen that the screw 24 will turn in the ferrule 25 and thus not rotate the plug. While the Aplug has a snug fit in the bore it is free to be moved downwardly, but its frictional. engagement with the boreis sufficient "to resist the torque of the screw which will rotate in the ferrule 25 of the swivel.

CVarious changes in the size and shape of the various elements, as werll as alterations and modifications, may be-made within the scope of the appended claims.

What I claim, isz.

1. In a choke valvefor oil pumping lines,

" a valve casing having a longitudinal passage and a vertical bore intersecting the passage; a plug element slidable through the ybore and comprising replaceable plug membersl adapted to be ejected from the bore, saidA plug members each having transverse ports,

and means -for pushing the plug element throughthe bore. I l ,l 2. lIn a chokeJvalve, a valve casing havlng a lon 'tudinal passa e extending therethrong and a vertical ore intersecting said assage a lurality of plugs-adapted to pass iii (successiire order entirely through said bore and having ports, spaced to` successively* register with saidI passage when the plugs are` placed end to end, and' means separate from the. plugs for forcing the plugs throughthe bore.

3. In a choke valve, a valve casing having a longitudinal passage extending therethroughand a vertical bore intersecting said' passage, a plurality of plugs adapted to pass` in successive order entirely through said bore and having ports spaced to Ysuccessivelyregister with said passage when A the plugs are plalced end to end, packing glands at each end of Lthe bore through which the plugs are passed, and means separate from the'plugs for forcing the plugs throughv the bore.

\ 4. In a choke valve, a valve casing having a longitudinal passage extending therethrough and a vertical bore intersecting said entirely through said bore and having ports spaced to successively register. with said passage `when the plugs .are placed end to end, packing glands at each end of the bore through which the plugs are passed, a support on the valve casing, ar screw mounted passage, a pluralitymf plugs adapted to pass in the support, and a ferrule swivelled onthe lower end of the screw for engaging the plugs. u i

5: The combination with a choke valve caslng havingI a longitudinal'passage and a vertlcal bore intersecting said passage, of a plurality of indiyidual plugs having means for vjoining their ends together and pro- 'vided with ister with the passage, and means separate from the plugs for forcing thez plugs through the core. f

6. In a choke valve for oil pumping lines. a valve casing havin'g a longitudinal passage and a vertical bore intersecting sai'dpassage, a plurality of replaceable plugs each having a tightsliding fit in the bore of the casing and provided with ports spaced .to 1

successively and individually register 'with the passage, said plugs being placed ond to end and movable downward only, and means separate from the plugs for pushing the plugs down through the casing bore.

7. In a choke valve for eil pumping lines,

a valvecasing having a longitudinal passage leo ports spaced to successively regand a vertical-bore intersecting the passage QHAR'LES E; FRAZIER. 

